So im on ps4 and my brother is on the next gen xbox. We both have crossplay enabled and both have mlb the show accounts linked. We both can receive the invite and join the lobby but whoever hosts it doesnt allow them to ready up. We have tried everything from switching host to unfriending and reinviting. It constantly says waiting for opponent but it wont allow him to ready up. Do i have to be on next gen as well? Please help.